1:2-4 tariff-tate measurement on KW-H, store the data of current and last month. 2:10 tariff min .range is 15 munntes ,2 season-cost tate per year for flexible and adaptive use . 3:LCD or LED Chianese display 4:HHU and hanldle computer remote ptogram ,read and nonaccessilbe data interchange 5:Date output interface of optical-electric isolation anf actrive ,passivse output interfaces realize automatic management . 6:Thress phase power supply ,indication of phase lose and automatic self recording